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Time frequency transmission method based on GNSS common-view time comparison algorithm, and receiver

A time-frequency transfer and time comparison technology, which is applied to instruments, measuring devices, satellite radio beacon positioning systems, etc., can solve the problems of difficult implementation, complex algorithms, and high cost of observation equipment, and achieves high precision and easy implementation.

Active Publication Date: 2018-01-19
杭州航天星寰空间技术有限公司
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Problems solved by technology

The full-view time comparison requires multiple receivers to observe multiple satellites at the same time, which has high requirements for the receiver and the comparison algorithm; although the carrier phase method has high precision, the cost of the observation equipment is relatively high, and the algorithm complex, difficult to implement

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  • Time frequency transmission method based on GNSS common-view time comparison algorithm, and receiver
  • Time frequency transmission method based on GNSS common-view time comparison algorithm, and receiver
  • Time frequency transmission method based on GNSS common-view time comparison algorithm, and receiver

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Embodiment Construction

[0057] The present invention will be further described below in conjunction with the accompanying drawings.

[0058] combine figure 1 , the invention discloses a time-frequency transfer method based on a GNSS common-view time comparison algorithm. The specific implementation steps of the GNSS common-view time comparison algorithm include:

[0059] (1) Establish the pseudo-range observation equation: continuously receive the navigation signals broadcasted by the satellite, calculate the time difference of the ground receivers at different locations according to the received signals, and establish the pseudo-range observation equation through the time comparison algorithm.

[0060] combine figure 2 , the pseudo-range measurement is the basis of the GNSS common-view time comparison algorithm based on pseudo-range observation, and its specific implementation method is as follows:

[0061] (1.1) The GNSS system sets multiple ground receivers at different locations on the earth, ...

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Abstract

The invention discloses a time frequency transmission method based on a GNSS common-view time comparison algorithm, and a receiver, belongs to the technical field of time comparison of a receiver of asatellite navigation system, and particularly relates to the aspects of satellite orbit determination, signal transmission delay correction and post processing of data. The common-view time comparison algorithm comprises steps of establishing a pseudo-range observation equation, carrying out modeling on an ionized layer delay correction value, a troposphere delay correction value and an earth rotation effect correction value and carrying out filtering and post processing on a real-time time comparison result. The hardware of the receiver mainly comprises a time frequency unit, a radio frequency unit, a signal processing unit and a monitoring unit and is used for carrying out satellite orbit determination, signal transmission delay correction and post processing of data. The method and thereceiver are advantaged in that 1, the method and the receiver are easy to achieve and the common-view time comparison is achieved only by allowing the to-be-measured receiver to observe one satellite simultaneously; and 2, the precision of the GNSS common-view time comparison method where multi-frequency Kalman filtering is added is higher than that of the pure common-view time comparison method.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation system receiver time comparison, and in particular relates to a time-frequency transfer method and a receiver based on a GNSS common-view time comparison algorithm. Background technique [0002] At present, the importance of time frequency is becoming more and more prominent, which is mainly reflected in the field of space technology, metrology, etc. Therefore, there is a need to use time frequency standards in more and more places. In the context of continuous improvement of positioning and navigation accuracy, high-precision time synchronization has become a key technology in various GNSS satellite positioning and navigation systems, and is an important guarantee for positioning and navigation accuracy. [0003] The time comparison algorithm is the key to realize the time synchronization technology, and it is an important method to determine the time difference of different ground r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42G01S19/32
Inventor 程禹田光远白文彬韩华吴限德谢亚恩孙楚琦路胜卓陈卫东倪蜂棋
Owner 杭州航天星寰空间技术有限公司
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